Printing-machine



(No Model.) 3-Sheets.-Sheet 1. J. T. HAWKI'NS.

PRINTING MACHINE.

No. 305,076. Patented Sept. 16, 1884.

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3 Sheets-Sheet 3 No Model.)

J. T HAWKINS.

PRINTING MACHINE.

No. 305,076.- Patented Sept. 16, 1884.

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JOHN T. HAIVKINS, OF TAUNTON, MASSACHUSETTS l PRINTING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 305,076, dated September 16, 1884. Application filed November 15, 1883. (No model.)

To all whom it may concern.- I

Be it known that I, JOHN T. HAWKINS, of 'Taunton, in the county of Bristol and State of Massachusetts, have invented a new and useful Improvement in Printing-Machines, which improvement or-invention is fully set forth andjllustrated in the following specification and accompanying drawings.

The object of the invention is to provide a machine to print separate sheets from ey lindrically surfaced type forms, stereotype or electrotype plates, or zincographic plates in a rapid and correct manner, delivering each printed sheet without contact of its printed side with any part of the mechanism, while at the same time providing a secure, quick, and correct method of straining and holding a zincographic plate or sheet upon the form or plate cylinder. Said latter method, however, is not herein claimed, the same forming the subject of a claim in an application now pending for other Letters Patent.

The novel features of the invention are clearly set forth in the claims.

In the accompanying drawings, Figure 1 is a side elevation of the machine. Fig. 2 is a plan with the inking and dampening apparatus removed. Fig. 3 is a longitudinal vertical section, in general outline, showing the positions and functions of the principal parts. Fig. 4 shows two views, enlarged, of the clamp the form-cylinder at its gripper-edge. Fig. 5 is an elevation, and Fig. 6 a transverse section, of the plate or form cylinder.

In the above figures, the letters A A indicate the main frames, in which the principal parts are journaled and supported.

B indicates the type or plate cylinder, journaled in the frames A at E; C, the impressioncylinder, carried in journatbox'es B, sliding in proper rectangular openings in the frames A, to allow of adjusting the impression by means of the set-screws 13.

0 indicates the feed-board from which the separate sheets are fed to the machine. A series of delivery-wheelsG", on a shaft, G, are journaled in the frames A. The deliverywheels G each carry a gripper, G Said grippers Gt, journaled in the wheels being secured to a rock-shaft G are operated to close upon and release the sheet at the proper time by any of the well-known means. (Not shown.) J ournaled in a pair of wheels, j are three or any suit-able number of gripper-shafts, j, each carrying grippers j. In the wheels j" are secured a similar number of rods parallel and near to the gripper-shafts 9', each rod having secured to it a series of rests, j upon the ends of which the grippers j* close. On the receiving-board J the printed sheets are delivered.

J 4 indicates a stop, against which the delivered sheets strike at their'leading or head end when released by the grippers J in dotted lines shows the position with the stop J reversed, in which the receivingboard may be placed for the reception of certain kinds of thin paper, the sheet dropping back to the stop after being released by the grippers y at a higher point than when J 3 is used, as shown in full lines. The wheels 9'" are carried on the shaft 0, journaled in the frames A. l The grippers j" are operated to open and close by the tumbler-cam f. The impressioncylinder 0 has upon its axis a spur-gear, G, to which the power is applied in any wellknown way. The spur-gear O engages aspurgear, 13, secured to the shaft E of the plate or fornrcylinder B, and the spur-gear 13 engages a spur-gear, G, secured to the shaft G of the delivery-wheels G Upon the small shaft G is secured a smaller spur-gear, G which in turn engages a spur-gear, G*, secured to the shaft 0 of the wheels j". The gears G, G", and G are so proportioned as to make the peripheral velocity of the wheels j less than that of the delivery-wheels G This construction is, however, arbitrary, and the spur-gear G may be made to directly engage the gear G, thus giving equal peripheral velocities to all the rotary members above described.

F indicates an ink-fountain; F, a doctorroller carried in vibrating arms f, securedto.

a rock-shaft, f*. The ink form-rollers f are lowered to the distributing-surface and raised to the plate-surface of the plate-cylinder aseach roller respectively passes them. Similarly L indicates a water-fountain; L, a water-fountain roller; L, a water doctor-roller carried in arms If, secured to the rock-shaft I The water form-rollers I are also raised and of the roller a, to which it is clamped by the clamps n and bolts of. The roller a is journaled in the cylinder at its ends, and is embedded for a part of its circumference througlr out its whole length in the cylinder B, to prevent its springing when under strain.

To the roller n at one end is secured the worm-wheel a, into which meshesthe endless screw n carried in lugs or bearings 92. The roller n is rotated by means of the endless screw a by which means the plate or sheet of zinc is strained securely in contact with the surface of the cylinder B. The clamp at has slots an out in its outer edge, (which edge forms a short continuation of the cylindrical surface of the plate or sheet of zinc Z.) corresponding inlatcral position with the grippers of the cylinder O and of the delivery-wheels G, so that either of the latter in opening or closing pass through the slots m while the zinc plate Z is not cut for their passage. The sheets are clamped by their leading unprinted margins upon the top of the clamp m by the grippers b of the cylinder B at points between the slots m The operation of the machine is as follows: The sheets, fed from the feed-board 0 in the usual way, are taken by the grippers of the cylinder 0 at each third revolution, and then taken by the grippers b of the cylinder 13 and held by them in contact with the plate or form after the impression is made until re leased to the grippers G of the deliverywheels G The grippers Gr convey the head of the sheet over until met by the more slowly-moving grippers j of the rotating delivery-framej, and the sheet is finally released by the grippers j, to fall successively by its ownweight, as arrested by the sheet-stops J uponthe receiving-board J, printed side up, and in an even pile. The speed of the delivery-frame j and of its grippers jis so proportioned that they shall travel much slower than the grippers G of the delivery-wheels G the latter overtaking the former until the grippers 3 have closed upon and the grippers G2 have released the sheet, at which point the speed of the sheet is much reduced, and it will from that point have its following end delivered from between the.forn1-cylinder B and the deliverywheels G faster than its head is removed by the grippers j of the delivery-frame j, thus looping itself upward until the tail end has passed entirely off the form by being stripped therefrom by the grippers j of the deliveryframe j This feature of the construction renders it unnecessary that the delivery-wheels G should be of sufficiently large diameters to strip the sheet completely from the form before releasing it. This construction also gives the sheet a slow motion through the air when re leased by the grippers jof the delivery-frame j to fall upon the receiving-table J Having thus fully described my said improvements as of my invention, I claim- 1. In a rotary printing-machine, the combination of a plate or form cylinder, an impression-cylinder, and a delivery cylinder or wheels, each of said cylinders carrying a series of grippers for the successive transfer ofthe sheet from one to the other,-substantially as set forth.

2. In a rotary printing-machine, the combination of a plate or form cylinder, an impression-cylinder, a delivery cylinder or wheels. and a rotary delivery-frame, said frame and each of said cylinders carryinga series of grippers for the successive transfer of the sheet from one to the other, substantially as set forth.

3. In a printing-machine for printing from a form or plate cylinder,-a rotary delivery device consisting of a cylinder or a series of wheels provided with grippers taking the sheet upward from the grippers of the plate or form cylinder, and a rotary gripper-frame carrying one 01* 111018 series of grippers taking the sheet downward from the grippers of said cylinder or wheels and depositing it, printed side up,upon a receiving-board placed beneath said gripper-frame without contact of the printed side with any part of the mechanism, substantially as set forth.

JOHN T. HAVKINS.

Witnesses FRANCIS REILLY, EDWARD I. BERRALL. 

